Home / 21,081.55-29,091.39-11,649.51

Finding the Fourth Proportional to 21,081.55, 29,091.39 and 11,649.51

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Solution

The fourth proportional to 21,081.55, 29,091.39 and 11,649.51 is: 16,075.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.55 : 29,091.39 = 11,649.51 : x
  2. Step 2: Convert to fraction form
    21,081.55/29,091.39 = 11,649.51/x
  3. Step 3: Cross multiply
    21,081.55x = 29,091.39 × 11,649.51
  4. Step 4: Simplify right side
    21,081.55x = 338,900,438.72
  5. Step 5: Solve for x
    x = 338,900,438.72/21,081.55
  6. Step 6: Final answer
    x = 16,075.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.